RDMA/hns: Use IDA interface to manage xrcd index

mainline inclusion
from mainline-v5.12-rc1
commit da43b7be
category: bugfix
bugzilla: 174002
CVE:NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=da43b7bebc3504f232b0849c04b787ca1544bee2

----------------------------------------------------------------------

Switch xrcd index allocation and release from hns own bitmap interface
to IDA interface.

Link: https://lore.kernel.org/r/1623325814-55737-7-git-send-email-liweihang@huawei.comSigned-off-by: NYangyang Li <liyangyang20@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Nwangsirong <wangsirong@huawei.com>
Reviewed-by: NChunZhi Hu <huchunzhi@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/infiniband/hw/hns/hns_roce_alloc.c

@@ -254,7 +254,7 @@ int hns_roce_get_umem_bufs(struct hns_roce_dev *hr_dev, dma_addr_t *bufs,
 void hns_roce_cleanup_bitmap(struct hns_roce_dev *hr_dev)
 {
 	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC)
-		hns_roce_cleanup_xrcd_table(hr_dev);
+		ida_destroy(&hr_dev->xrcd_ida.ida);
 
 	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_SRQ)
 		hns_roce_cleanup_srq_table(hr_dev);

drivers/infiniband/hw/hns/hns_roce_device.h

@@ -962,7 +962,7 @@ struct hns_roce_dev {
 
 	struct hns_roce_cmdq	cmd;
 	struct hns_roce_ida pd_ida;
-	struct hns_roce_bitmap xrcd_bitmap;
+	struct hns_roce_ida xrcd_ida;
 	struct hns_roce_uar_table uar_table;
 	struct hns_roce_mr_table  mr_table;
 	struct hns_roce_cq_table  cq_table;
@@ -1144,13 +1144,12 @@ void hns_roce_init_mr_table(struct hns_roce_dev *hr_dev);
 void hns_roce_init_cq_table(struct hns_roce_dev *hr_dev);
 int hns_roce_init_qp_table(struct hns_roce_dev *hr_dev);
 int hns_roce_init_srq_table(struct hns_roce_dev *hr_dev);
-int hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev);
+void hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev);
 
 void hns_roce_cleanup_eq_table(struct hns_roce_dev *hr_dev);
 void hns_roce_cleanup_cq_table(struct hns_roce_dev *hr_dev);
 void hns_roce_cleanup_qp_table(struct hns_roce_dev *hr_dev);
 void hns_roce_cleanup_srq_table(struct hns_roce_dev *hr_dev);
-void hns_roce_cleanup_xrcd_table(struct hns_roce_dev *hr_dev);
 
 int hns_roce_bitmap_alloc(struct hns_roce_bitmap *bitmap, unsigned long *obj);
 void hns_roce_bitmap_free(struct hns_roce_bitmap *bitmap, unsigned long obj);

drivers/infiniband/hw/hns/hns_roce_main.c

@@ -786,14 +786,8 @@ static int hns_roce_setup_hca(struct hns_roce_dev *hr_dev)
 
 	hns_roce_init_pd_table(hr_dev);
 
-	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC) {
-		ret = hns_roce_init_xrcd_table(hr_dev);
-		if (ret) {
-			dev_err(dev, "failed to init xrcd table, ret = %d.\n",
-				ret);
-			goto err_pd_table_free;
-		}
-	}
+	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC)
+		hns_roce_init_xrcd_table(hr_dev);
 
 	hns_roce_init_mr_table(hr_dev);
 
@@ -824,9 +818,8 @@ static int hns_roce_setup_hca(struct hns_roce_dev *hr_dev)
 	ida_destroy(&hr_dev->mr_table.mtpt_ida.ida);
 
 	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC)
-		hns_roce_cleanup_xrcd_table(hr_dev);
+		ida_destroy(&hr_dev->xrcd_ida.ida);
 
-err_pd_table_free:
 	ida_destroy(&hr_dev->pd_ida.ida);
 	hns_roce_uar_free(hr_dev, &hr_dev->priv_uar);
 

drivers/infiniband/hw/hns/hns_roce_pd.c

@@ -134,35 +134,27 @@ void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev)
 
 static int hns_roce_xrcd_alloc(struct hns_roce_dev *hr_dev, u32 *xrcdn)
 {
-	unsigned long obj;
-	int ret;
-
-	ret = hns_roce_bitmap_alloc(&hr_dev->xrcd_bitmap, &obj);
-	if (ret)
-		return ret;
+	struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida;
+	int id;
 
-	*xrcdn = obj;
+	id = ida_alloc_range(&xrcd_ida->ida, xrcd_ida->min, xrcd_ida->max,
+			     GFP_KERNEL);
+	if (id < 0) {
+		ibdev_err(&hr_dev->ib_dev, "failed to alloc xrcdn(%d).\n", id);
+		return -ENOMEM;
+	}
+	*xrcdn = (u32)id;
 
 	return 0;
 }
 
-static void hns_roce_xrcd_free(struct hns_roce_dev *hr_dev,
-			       u32 xrcdn)
+void hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev)
 {
-	hns_roce_bitmap_free(&hr_dev->xrcd_bitmap, xrcdn);
-}
+	struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida;
 
-int hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev)
-{
-	return hns_roce_bitmap_init(&hr_dev->xrcd_bitmap,
-				    hr_dev->caps.num_xrcds,
-				    hr_dev->caps.num_xrcds - 1,
-				    hr_dev->caps.reserved_xrcds, 0);
-}
-
-void hns_roce_cleanup_xrcd_table(struct hns_roce_dev *hr_dev)
-{
-	hns_roce_bitmap_cleanup(&hr_dev->xrcd_bitmap);
+	ida_init(&xrcd_ida->ida);
+	xrcd_ida->max = hr_dev->caps.num_xrcds - 1;
+	xrcd_ida->min = hr_dev->caps.reserved_xrcds;
 }
 
 int hns_roce_alloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
@@ -175,18 +167,18 @@ int hns_roce_alloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
 		return -EINVAL;
 
 	ret = hns_roce_xrcd_alloc(hr_dev, &xrcd->xrcdn);
-	if (ret) {
-		dev_err(hr_dev->dev, "failed to alloc xrcdn, ret = %d.\n", ret);
+	if (ret)
 		return ret;
-	}
 
 	return 0;
 }
 
 int hns_roce_dealloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
 {
-	hns_roce_xrcd_free(to_hr_dev(ib_xrcd->device),
-			   to_hr_xrcd(ib_xrcd)->xrcdn);
+	struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device);
+	u32 xrcdn = to_hr_xrcd(ib_xrcd)->xrcdn;
+
+	ida_free(&hr_dev->xrcd_ida.ida, (int)xrcdn);
 
 	return 0;
 }